Anchor for teeth-fillings.



J. V. DAVIS.

ANCHOR FOR TBETH FILLINGS.

APPLIGATIONHLED APR. s, 1914.

Patented Dec. 1

. .l ...EEE ...NU ,1| llllll Il. E` f Z 1 n..

............. .WMMMMIMMMIWMMMWMMMMMQ Aimmmnwmmmmmmwmmrwmmmmmmmmmm.vffffff//A OFCE.

JOSEPH V. DAVIS, OF CONCORD, NORTH CAROLINA.

ANCHOR FOR TEETI-I-FILLINGS.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Application lcd April 8, 1914. Seria1 No. 830,524.

To all wiz om it may concern Be it known that I, Josnrn VERNON DAVIS, acitizen of the United States, residing at Concord, in the county ofCabal-rus and State of North Carolina, have invented certain new anduseful Improvements in Anchors for 'leeth-Fillings, of which thefollowing is a specification.

This invention relates to dentistry and more particularly toimprovements in anchoring constructions such as are used in filling orbridging teeth and the primary object of the invention is the provisionof an adjustable anchor for attachment to natural teeth for holdingfillings within cavities in the teeth.

With the foregoing and other objects in view this invention consists insuch novel features of construction, combination and arrangement of'parts as will be hereinafter more fully described, illustrated in theaccompanying drawings and claimed.

In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters of reference designatelike or corresponding parts throughout the several views, and in whichFigure 1 is a side elevation of' a tooth showing parts thereof brokenaway to expose the improved anchorage attached thereto. Fig. 2 is asectional view on the line 2-2 of Fig. 1. Fig. 3 is a detail perspectivevien7 of a detachable sleeve using the anchor construction, and Fig. 4is a central sectional view through a part of the improved fillinganchor.

Referring more particularly to the drawings, 1 designates the bodyportion of a tooth which has a cavity 2 formed therein. The tooth 1 hasthe walls of the cavity 2 smooth and straightened when it is desired tolill the cavity of the tooth7 and recesses 3 and i are drilled into thetooth from the cavity 2. rI`he recess 3 extends toward the root of thetooth 1 while the recess l extends diagonally into the tooth body andtoward the incisory edge of the tooth as is clearly illustrated in Fig.1.

An anchor 7 .is attached to the tooth body 1 by the diagonallyprojecting anchoring` pin S, which pin is seated in the recess l andtends to prevent the dislodgment of the filling. The anchor 7 isprovided with a longitudinally extending centrally disposed internallyscrew-threaded bore 9 in which is adjustably seated the externally screwthreaded pin 10. The angular relation of the anchor arm 8 and the screwpin 10,when adjusted in the respective recesses t and 3, holds theanchor 7 in the cavity 2. A detachable sleeve 11 is mounted about theanchor 7 and has a longitudinally extending slot 12 formed therein topermit oit' the pas sage ot' the sleeve 11 upon the anchor' 7, and toreceive the anchor arm 8. The :filling 5 is formed upon the sleeve 1land in the cavity 2, and is attached to the anchor 7 and the tooth 1 inthe cavity 2 by cement or other similar adhesive material.

In mounting a filling in the cavity 2 of the tooth 1, the anchor 7 isproperly positioned in the cavity 2 so that the anchor arm 8 will beseated in the recess Ll, after which the pin l0 is moved or adjustedwithin the anchor 7 so that the terminal end thereof which protrudesbeyond the end of the anchor 7 will rest in the recess 3. |The anglerelation ot' the anchor arm 8 and the pin 10 will hold the anchor 7 inthe cavity 2.

The anchor 7 may be used with or without the sleeve 11 as the casedemands. lVhen the anchor 7 is used without the sleeve 11, the anchor 7is placed in proper position as aforesaid mentioned and the filling isplaced 1n the cavity 2 about the anchor 7. IVhen the anchor 7 is usedwith the detachable sleeve 11, said sleeve 11 is placed in positionabout the anchor 7, the anchor 7 being in proper position. the filling5, or pattern for the filling for filling in case of inlay work, isplaced in the cavity 2 and about the sleeve l1, being attached to thesleeve 11. The sleeve 11 and the filling 5 are attached to the anchor 7and the tooth 1 in the cavity 2 by means of cement or other suitableadhesive material.

In reducing the invention to practice certain minor features ofconstruction, combination and arrangement of parts may necessitatealterations to which the patentee is entitled provided such alterationsare comprehended within the scope of what is claimed.

What is claimed is 1. In an anchor structure for attaching fillings totooth bodies, a hollow anchor having an angularly projecting anchoring`pin formed thereon for insertion into a tooth body, and an adjustableanchoring pin carried by said anchor body for engagement with a tooth,said angularly projecting an- Chor pin and said adjustable anchoring pinbeing disposed angularly to each other for securely holding said anchorbody and a lling carried thereby attached to a tooth body.

2. In an anchor structure for attaching llings to tooth bodies, ananchor having an angularly projecting anchoring pin formed thereon forinsertion into a tooth body, a second anchoring` pin carried by saidanchor body for engagement With a tooth, said angularly projectinganchor pin and said second named anchor pin being disposed in angularrelation to each other for securely holding said anchor body and thefilling 15 carried thereby attached to a tooth body.

In testimony whereof I aix my signature in presence of two Witnesses.

JOSEPH V. DAVIS. i Witnesses i L. T. HARTSELL, C. A. IsENHoUR.

Copies of this patent may be obtained for five cents each. by addressingthe Gmmissioner of Ratents, Washington, D. G.

